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Guide numbers for flash - Photography Tips, Tricks and Techniques
- https://www.photographytips.com/page.cfm/2172#:~:text=A%20guide%20number%20%28GN%29%20is%20an%20indication%20of,with%20a%20certain%20film%20speed%20and%20flash%20unit.
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Understanding Guide Numbers | B&H eXplora
- https://www.bhphotovideo.com/explora/photography/tips-and-solutions/understanding-guide-numbers
- GN = Subject Distance from Flash Source x f/Stop. Guide numbers are based on a simple mathematical equation that states: the light output of an electronic flash is equal to the distance of the flash unit from the subject multiplied by the lens aperture, or f/stop.
What is a guide number? Photography terms explained - EOS …
- https://www.eos-magazine.com/articles/eospedia/what-is/guide-number.html
- GN: GUIDE NUMBER The power of a built-in flash or Speedlite is given as a guide number (GN). The higher the number, the brighter the flash. A guide number can be determined by taking a correctly exposed photograph of a subject and then multiplying the camera-to-subject distance by the lens aperture used.
Guide Numbers Explained for Manual Flash - John Peltier …
- https://www.jmpeltier.com/guide-numbers-explained-manual-flash-calculator-chart/
- What is a guide number? In short, guide numbers on a flash indicate how much light that flash can produce. You’ll see them in the specs indicated in either meters or feet. The higher the guide number the further the flash will reach.
DSLR Camera Basics | Flash Level (Guide Number) - Nikon
- https://imaging.nikon.com/lineup/dslr/basics/24/02.htm
- Flash Level (Guide Number) In flash photography, the light from the flash is used to illuminate the subject. The distance at which a built-in flash can light a subject is however limited. ... Using the guide number, it is easy to calculate the how close the subject should be at a given aperture or the aperture required to photograph a subject ...
Understanding Camera Flash Guide Numbers, plus GN …
- https://scantips.com/lights/flashbasics1c.html
- Guide Number (GN) is a numerical method used to determine exposure of direct flash for Manual flash power levels, to automatically deal with the Inverse Square Law, making the math be trivial. Guide Number = Distance x fstop (values which actually give a proper exposure) f/stop = Guide Number / Distance (aperture for other distances)
Guide numbers for flash - Photography Tips, Tricks and …
- https://www.photographytips.com/page.cfm/2172
- A guide number (GN) is an indication of a flash unit's power (how much light it gives off), and is used in a simple mathematical formula to calculate aperture. The formula is GN/distance = ƒ/stop. It is simply the product of a distance and an ƒ-stop that gives correct exposure with a certain film speed and flash unit.
Understanding Flash's Guide Number (GN) — Daily Photography Tips
- https://www.dailyphotographytips.net/blog/flash-photography/understanding-flash-guide-number-gn
- Guide Number, usually abbreviated GN, determines power rating of flash unit that describes how powerful flash unit is and how far it can shoot. In another word, GN specifies the power of an electronic flash in a way that it can be used to determine the right f-stop to use at a particular shooting distance and ISO setting.
Tutorial: How to use the guide number of your flash
- https://neilvn.com/tangents/tutorial-how-to-use-the-guide-number-of-your-flash/
- GN = distance * f-stop Your flash’s Guide Number (GN) is determined at 100 ISO, when it gives correct exposure at a certain distance, multiplied by the f-stop The idea that we can figure out the manual flash exposure by the combination of distance and aperture (for a given ISO setting), was covered in these recent topics:
Flash Guide Number - The Digital SLR Guide
- https://www.digital-slr-guide.com/flash-guide-number.html
- The guide numer is an indication of a flash's ability to overpower ambient light and brighten your subject. Flash Guide Number Formula There's a mathematical formula for calculating flash guide numbers: Guide Number = [Flash to Subject Distance] x [F-Stop]
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